New Tools

Circle Image Generator

Quickly crop images into perfect circles for profile pictures or icons. Supports transparent backgrounds and custom colors.

Sick Leave Pay Calculator

Quickly calculate your sick leave pay and payout percentage based on your years of service and monthly salary.

QQ Account Value Calculator

Enter a QQ number to estimate its market value instantly. This tool calculates the worth of a QQ account based on factors like account level, digit length, and premium number patterns.

JavaScript Operator Precedence Checker

Quickly check JavaScript operator precedence and associativity to avoid logic errors in your code.

WebSocket Tester

Quickly connect to WebSocket servers, send and receive messages in real-time, and monitor communication status online.

Go Operator Precedence Checker

Quickly check Go operator precedence and associativity to understand expression evaluation order. Free online Golang operator lookup tool.

Objective-C Operator Precedence Cheat Sheet

Free online quick reference cheat sheet for Objective-C operator precedence and associativity. Easily check execution order and evaluation rules.

VB Operator Precedence Checker

Quickly check Visual Basic operator precedence and associativity. Resolve VB expression calculation issues with this free online reference guide.

Python Operator Precedence Checker

Quickly check the precedence and associativity rules for all Python operators with our free online lookup tool.

PHP Operator Precedence Checker

Quickly check PHP operator precedence and associativity with this free online programming tool.

Java Operator Precedence Checker

Quickly check Java operator precedence with our free online reference tool. Get a complete precedence table and associativity rules for accurate coding.

C Operator Precedence Checker

Check C operator precedence and associativity online to easily understand and evaluate complex expressions.

C++ Operator Precedence Checker

Quickly check C++ operator precedence and associativity to help understand the evaluation order of complex expressions.

C# Operator Precedence Table

Quickly check C# operator precedence and associativity with this free online reference table.

Online PHP Function Reference

Enter a PHP function name to quickly look up its description, parameters, and return values online.

Linux Command Reference

Search Linux command usage, options, and examples. Quickly master terminal commands and parameters online.

GBK编码查询器

查询字符与GBK编码的对应关系，支持双向快速检索。

GB2312汉字编码查询器

GB2312编码查询工具，输入汉字获取区位码、国标码、内码对照

Extended ASCII Lookup

Free online Extended ASCII (EASCII) lookup tool. Quickly find characters, decimal, hex, octal, binary, and HTML entities in the EASCII code table.

Bootstrap Glyphicons Finder

Free online Bootstrap Glyphicons finder. Quickly search and copy CSS class names and Unicode values for Bootstrap 3 icons to use in your web projects.